真空搅拌铸造SiC_P/ZL101A复合材料显微组织及力学性能研究  

Research on Microstructure and Mechanical Property of SiC_P/ZL101A Composites by Vacuum Stir Casting

作　　者：李早[1] 王狂飞[1] 南红艳[1] 郭居魁 LI Zao1, WANG Kuangfei1, NAN Hongyan1, GUO Jukui2(1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 456000, China; 2. AVIC, Xi＇an Braking Branch, Xingping 713100, Chin)

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作456003 [2]中航飞机股份有限公司西安制动分公司,陕西兴平713100

出　　处：《热加工工艺》2018年第14期107-110,116,共5页Hot Working Technology

基　　金：国家自然科学基金项目(59637050)

摘　　要：通过对真空感应炉熔炼制备SiCP/ZL101A复合材料的显微组织、力学性能研究,分析了SiCP颗粒分布均匀性的工艺影响因素。结果表明：SiCP预处理有助于改善SiCP与熔体颗粒之间的润湿性,减少SiCP颗粒聚集,其最佳预处理工艺为1000℃/2h;液面涡流有利于SiCP颗粒均匀化,增加搅拌器转速可使液面涡流深度增加,有助于液面边缘SiCP颗粒与熔体混合;SiCP/ZL101A复合材料最佳制备工艺为搅拌转速300r/min、搅拌1h,其布氏硬度和比磨损率分别达到138.7HBS和1.35×10-4mm3·m-1·N-1。The microstructure and mechanical properties of SiCp/ZL101 A composites were investigated, which were prepared by vacuum stir casting, and the process factors which affected distribution uniformity of the SiCPparticles were analyzed. The results show that SiCPpretreatment can help improve the wettability between the SiCPparticles and the melt,and thus reduce the SiCPparticle agglomeration when SiCPparticles were pretreated at 1000 ℃ for 2 h. Formed vortex on the surface of the melt makes the SiCPparticle uniform distribution, increasing agitator rotational speed can make vortex depth increase, which facilitates SiCPparticles at the edge mixed with the melt. The optimum preparation technology is rotating speed 300 r/min and stirring time 1 h, and thus the brinell hardness and the specific wear rate of SiCP/ZL101 A composites are138.7 HBS and 1.35 ×10-4 mm3·m-1·N-1 respectively.

关 键 词：真空搅拌铸造 SiC_P/ZL101A复合材料 SiC_P颗粒 显微组织 

分 类 号：TG249[金属学及工艺—铸造] TB333[一般工业技术—材料科学与工程]